View Compilation Error

0_0_30308664_6024.cpp: In function 'int32_t main()':
0_0_30308664_6024.cpp:33:16: error: 'j' was not declared in this scope
             if(j==tlen2)ans++,i--;
                ^
0_0_30308664_6024.cpp:33:19: error: 'tlen2' was not declared in this scope
             if(j==tlen2)ans++,i--;
                   ^